The following may be of concern to those who use GPS in
critical applications as well as mariners.

* Forwarded (from: netmail) by Richard Webb using timEd 1.10.y2k+.
* Originally from Richard Webb (1:116/901) to ncs@mmsn.org.
* Original dated: Tue Jun 05, 21:03

Colleagues:


This was sent by k1all to the intercon ncs list, am brieflyy summarizing here
from that alert.  It states;

Continuing until approximately 07 June  2012,  the  National Geospatial
Intelligence  Agency  (NGA)  has  promulgated  a NAVAREA warning regarding 
the possibility  for  heightened levels  of  solar flare activity. Associated
with this solar activity is the  potential  for  disruptions  of  electronic
navigation,  high and low frequency radio transmissions, and other electronic
communications  methods.  As  such,  solar activity  has  the  potential  to
negatively impact mariners ability to navigate safely and communicate
effectively while underway.  It  is  therefore  recommended  that mariners not
solely rely on electronic  means  for  safe  navigation  and should  
consider  ALL  alternate  means  to  verify  their position. Please see the
below message excerpt from the NGA.





FM NGA NAVSAFETY WASHINGTON DC

BT

UNCLASSIFIED//

MSGID/GENADMIN/NGA NAVSAFETY WASHINGTON DC//


SOLAR ACTIVITY.

1. HF AND LF COMMUNICATIONS MAY BE DISRUPTED BY THE EFFECTS
    OF SOLAR FLARES.

2. DURING INCIDENTS AT SEA, MARINERS SHOULD CHECK THEIR
    POSITION USING ALL ALTERNATE MEANS AVAILABLE.

3. CANCEL NAVAREA 292/12.

4. CANCEL THIS MSG 07 JUN.//

#0672

BT



Regards,
           Richard
___

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 * Origin:  (1:116/901)